Cabbubb l ee



O. B. MONOSMITH.

CABBURETERf APPLICATION mu) AUG.I7.1914.

1,1 94,055, Patented Aug. 8, 1916.

ammo/14km l v'bt'meooco B M 5m i11 all OLNEY B. MONOSMITH, OF LORAIN,OHIO.

GARBURETEE.

To all whomit may concern iBe it known that LOLNnr B. Monosisrrrn, acitizen of the United States, residing at Lorain, in the county ofLorain and State of Ohio, have invented certain new and usefulImprovements in Carburetors, of Win03 the following is a specification.

This invention relates to carburetors for internalcombustion engines,and is an improvement in both structure and efiiciency over thecarburetor disclosed in my former application filed Feb. 9, 1914, andhaving Serial No. 817,404. The principal object of the present in:vention is to provide a carburetor adapted to operate economically atvarying speeds of the engine in the same general way as my said othercarhureter; but is so constructed that the removable parts may he moreconveniently interchanged to make the carburetcr suitable for differentengines, and the adjustments for regulating the flow from the auxiliarycarbureting chamber made by simply turning an easily accessible outsidevalve; 7

In order that the invention may be clearly understood, the same will hehereinafter fully described in connection with the accompanying drawingswhich illustrate a preferred embodiment thereof, and the novelfeaturesof the invention will be distinctly pointed out in the appendedclaims.

In the drawings like characters of reference indicate correspondingparts.

Figure 1 is a sectional elevation of a carburetor illustrating myinvention, Fig. 2 is a sectional view taken on line 2---2 of Fig. 1,Fig. 3 is a plan section taken on line 3 -3 of Fig. l, and Fig i is aperspective view of the spray plate.

Referring to the drawings, 1 represents a vertical air passage,- whichis cylindrical in cross section, and ex tending at a right angletherefrom is its inlet end indicated by Z. A butterfly valve 3 isadapted to control the air inlet. The lower part of the air passage 1 isbored slightly larger, shown at 4, to receive a V shaped. spray plateprovide a shoulder {3 against which its upper edge abut: The spray plate5 is admitted at ."l'l of the air passage, which '7 for receiving adished cap provided with a central proengaging the bottom of to held itin place by forci. said shoulder 6,. The cap is Specification of LettersPatent.

Patented Aug. 8, 19168 3 Application filed August 17, 1914, Serial R0.857,058.

preferably provided with a nut portion'lO for the accommodation of awrench. Said spray plate 5 is preferably formed from a single strip ofmetal of a width equal to the bore a, and consists of a pair ofdiverging or inclined sides 11 joined together by the bottom 12. Theedges of thcsides 11 are curved to conform to the bore 4, and it will benotedthat the spray plate entirely separates the lower portion of theair passage from its upper part. The sides 11 of the spray plate areprovided with perforations 13, and these perforations are preferablyevenly staggered and made tapering with their larger areas at the innersurfaces of the sides to produce a Venturi action as the air passestherethrough.

The outer wall of the air passage 1 is considerably thickened at 14 andjust above the top of the spray plate this Wall is provided with ahorizontal main feed opening 15 leading to a vertical 0 -ening or well16 in said thickened wall. oinmunication from the "float chamber 17,supported on the side of said thickened wall, to the lower end of thevertical opening 16 is establishedby means of a recess 18, which extendsfrom the-lower part of the float chamber. In order to provide convenientmeans for regulating the flow of gasolene from the float chamber to thevertical opening 16, the lower end of the thickened Wall 14 is bored at19 and threaded at 20 for receiving a removable plug nozzle 21. A.lateral opening 22 in the plug nozzle permits the gasolene to flow fromthe recess 18 of the float chamber up through its'hollow center 23 andthen out of its conical shaped outlet 24 into the ver-. tical opening16. The purpose of making the outlet 24 conical is to provide a sharpedge to reduce the friction of the flow of -the gasolene through theoutlet, and also to provide an uninterrupted flow; The joint under thehead 25 of the plug nozzlemay be made tight against leakage by asuitable ivasl'ier 26. By employing plug noz ales having different sizeddutlcts, the flow of the gasolene into the vertical'opening 16 iscontrolled by means of a valve 30, which is slightly smaller in diameterthan the enlarged portion of said opening and is adapted to cooperatewith the valve seat 29. The valve 30 is operatively mounted in a plugfitting 31, which is screwed into a threaded opening 32, and is providedon its outer end with a. cap 33 adapted to serve as a packing box forthe valve stem. The valve may be readily adjusted from the outside bymeans of the handle A throttle valve is ar ranged in the outlet of theair passage, and is so positioned that when closed, its edge partiallycloses the auxiliary feed opening 2-7 for a purpose hereinafterexplained.

It will be noted that the spray plate 5, and the plug nozzle 21 arereadily removable, while the valve 30 may be easily adjusted. The mainpurpose of making these parts in this way being to construct a standardbureter, wherein a spray plate having different numbers of perforationsmay be used, or the plug nozzle exchanged for another provided with adifferent sized outlet, or the valve adjusted. to give a different sizedauxiliary feed opening. It will be appreciated' that this is necessaryfor obtaining the best results for different types and ll. 1. ofengines.

Now that the construction of. the carburcter has been fully disclosed,the operation of the same will be explained: In starting the engine, thebutter-fly valve 3 is closed and the throttle valve 35 slightly opened.This causes a vacuum in the air passage, and the gasolene flows from themain feed opening 15 down onto the inner surfaces of the sides of thespray plate 5. The butter-fly valve 3 is then fully opened to admit air,which passes through the tapering perforations 13 of the spray plate,thereby creating a Venturi action which causes the bin film of gasoleneupon the inner surfaces of its sides to become mixed with the air, andthis uniform rich mixture enters the engine for starting the same.

To run the engine at slow speed, the throttle valve 35 is closed withits edge partially covering the auxiliary feed opening 27 as shown, thebutter-fly valve 3 remaining fully open to admit air. This incoming aircirculates under the bottom of and around the outside of the spray plate5 and tiasses through the perforations 13, then upwardly between theside of the spr y plate. A part of this air rushes between the edge ofthe throttle valve 35 and the auxiliary feed opening 27, while thebalance enters the main feed opening 15, thereby substituting an outwardflow of air for an inward liow of gasolene. This prevents the gasolenefrom flowing onto the sides ofthe spray plate during the operation ofthe auxiliary carbureting chamber. The circulation of air currentsthrough the feed opening 15 laps the surface of the gasolene in thelower part of the vertical opening 16 and mixes ticrewith. This mixtureflows upwardly through the upper part of the vertical opening 16, andthen inwardly through the auxiliary feed opening 2-7 into the airpassage for running the engine at very slow speed. To increase the speedof the engine from its slowest speed is as follows: The operation of theauxiliary carbureting chamber stops as soon as the vacuum in the airpassage caused by the action of the spray plate 5 is sufiicient to causethe gasolene to flow from .themain feed opening 15. The 'u-ogression offlow of air and gasolene from this point to the highest speed of theengine controlled by the law of capillary flow.

It will be understood that slight changes in the construction andarrangement of parts may he made within the scope of the claims,

ilaving fully described my invention what i claim is:

1. In a carburetor, the combination of an air passage, the air passagehaving a feed opening through its wall, a float chamber connected withthe feed opening, a bent-up spi f plate consisting of a pair of divergmgsides connected by a bottom arranged within me air passage for receivingthe fiow from the feed opening upon its inner surfaces, and the sprayplate being perforate}, substantially as described.

2. In a carburetor, the combination of an air passage, the air passagehaving a feed opening through its wall, a float chamber connected withthe feed opening, a bent-up spray plate consisting of a pair of flatdiverging sides connected by a bottom arranged withinvthe air passagefor receiving the flow from the feed opening upon its inner surfaces,the spray plate being provided with perforations, and the perforationshaving tapering sides with their larger areas at the inner surfaces ofthe spray plate, substantially as described.

In a carburetor, the combination of a vertical air passage having a sideinlet, the air passage having a feed opening through its wall, a floatchamber connected with the feed opening, a removable V shaped sprayplate arranged within the air passage below said feed opening forreceiving the flow from the feed opening upon its inner surfaces, thespray plate being perforated. the

air passage having a lower open end for admitting the spray plate, andmeans for ciosing said open end of the air passage,

substantially as described.

4:. In a carburetor, the combination of a verticai air passage hav ng aside inlet, the air passage having a. feed opening through its wall, afloat chamber connected with the feed opening, the air passage having alower open end, the lower portion of the air pasln s. csrlmreter, thecombination of a .al air passage, the air passage having through itswell, a spray the air passage below the m the wall of the air passage:1, vertical opening cmnmnnicating ;-h the iecil opening, the vertical.opening 1; ill its lower end, a, plug nozzle v wrestle-ll into the openend of the plug; nozzle being Rt hm tapering outlet, the n-, nozz ehaving" a, lateral opening lend to its hollow center, and a floatchamber connected with the lateral opening of the plugnozzlsubstantially described.

6. In e carburetor, the combination of a vertical eir passage, the airpassage having a vertical opening in its wall, the wall of the airpassage having: a main feed opening extending thorethrough from thevertical ijipening, spray plate arranged in the air 1 ssage below themain feed. opening, the spin plate l'lfllllg perforated, a llontcheniher connected with. said vertical opening below the main feedopening, the Wall of the air passage having an auxiliary feed openingextending therethrough from said vertical opening, and a valve forcontrolling the lion? from the auxiliary "feed opening, substantially asdescribed.

'1" In a carbureter, the combination of a vertical air passage, the airpassage having a vertical opening in its Wall, the Wall of the oil:passage having a main feed opening ex tending theiethrongh from thevertical 1r ning, a spray plate arranged in the air passage below themain feed opening, the spray plate being perforated, n float chamberconnected with said vertical opening below the main feed opening, thewall of the air [Massage having an auxiliary feed openin; extci'idingtherethrongh from said vertical opening, :1 valve operative from theoutside for controlling the flow from the auxiliary opening, a throttlevalve in the air passage adapted when closed to partially close theauxiliary feed opening, and lmtterlly valve for controlling the inlet olthe air passage, substantially as described.

lo testimony whereof I aflix my signature in presence of two witnesses()LNEY B. MONOSLHTH.

Witnesses Gnonon F. Gessmtn,

B. GANsnN,

